It will make it fun though. =p

Like there are ways out of it. For example use alchemy in small doses. Like light a small fire on your thumb every now and then. This will keep the heavy side affects at bay like loss of rational judgement and at the same time the drain on your sanity will be minute. But come on having slight hallucinations here and there can be a lot of fun. xp  

Also the weeding is actually indiscriminate. Of course the Rank A students present will view you all as inferior and will try to get rid of you. That is where it gets interesting, our rank Bs will have to make an alliance with each other to survive this. Hence more character interaction. 

Also I apologize for not posting by now. I have a bad throat infection that has kept me occupied. x.x